Error with Livestream API authentication

Question

Application is no longer successfully connecting with their Livestream endpoint which has been working for certain number of time. There have been no changes to the application or Livestream configuration but the the access token is no longer getting generated. Instead if they get either of thefollowing response:

{"error":"invalid_client","error_description":"the organization associated with this client is invalid"}

{"error":"invalid_client","error_description":"the user associated with this client is invalid"}

Note: The above is the response returned to generate the access token rather than connecting to the Livestream endpoint. For example, this is the command being used:
curl -i -v "https://api.omniture.com/token" -u "[client application id]:[client secret]" -d "grant_type=client_credentials"

Cause

Due to any of the following:
1) Adobe ID/IMS user, who created the application id use to connect to Livestream, is no longer valid.
2) Change in Adobe ID/IMS user unlinked it with Analytics company or backend IMS system